Hello Emil,
What firmware version and for what device you are trying to install? And from where you downloaded it? Since from picture it looks like you are trying to use “configuration file” as “firmware image”.
If you want to update peplink firmware to the newest version just use auto-updater button “Download and Upgrade”.
Regards,
Laurynas
@Emil_Escribano You may have to step your upgraded instead of going to the latest one.
Try 8.1 first from 8.02.
The firmware archive is located here: https://www.peplink.com/support-01/firmware-archive/
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